sirius app on Ipad mini

I renewed my online subscription and the app on my ipad mini stopped working. So I deleted it and then tried to upload it again. It will not upload it says it is not connecting with itunes. I called sirius customer service and the "tech" said he doesn't know anything about apple products. i called apple care and they had me download something else no problem there is something wrong with the sirius/xm link. It is working on regular dell laptop and on android phone. can anyone help me?